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Finding the Fourth Proportional to 392,440.80, 588,704.40 and 143,176.80

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Solution

The fourth proportional to 392,440.80, 588,704.40 and 143,176.80 is: 214,780.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,440.80 : 588,704.40 = 143,176.80 : x
  2. Step 2: Convert to fraction form
    392,440.80/588,704.40 = 143,176.80/x
  3. Step 3: Cross multiply
    392,440.80x = 588,704.40 × 143,176.80
  4. Step 4: Simplify right side
    392,440.80x = 84,288,812,137.92
  5. Step 5: Solve for x
    x = 84,288,812,137.92/392,440.80
  6. Step 6: Final answer
    x = 214,780.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.